Circulating oil pump for internal-combustion engines



March 17, 1925.

' 1,530,299 T. R. R. CHILCOTT CIRCULATING 01 PUMP FOR INTERNAL COMBUSTION ENGINES Filed July 1923 Patented Mar. 17, 1925.

urn s THOMAS ROBERT RELLEEN CHILCOTT, OFYRANDWICK, -1\TEAE SYDNEY, NEW scorn WALES, AUSTRALIA.

CIRCULATING OIL PUMP FOR ILlTERNAL-COMIBUSTION ENGINES.

Application filed. July 24,

To all whom it may concern Be it known that I, THOMAS ROBERT REL- CHILGOTT, a subject of the King of Great Britain, residing at Randwick, near Sydney, in the State of New South ales,

Commonwealth of Australia, have invented certain new and useful Improvements in Circulating Oil Pumps for Internal-Combustion Engines, of which the following is 0 a specification.

This invention has reference to circulating oil pumps for internal combustion engines for propelling motor vehicles. Such pumps heretofore have been driven by mechanical connection with the engine crank shaft or by a cam shaft, and frequently resulted in an excessive volume of lubricant being forced into the combustion chamber and carbon deposited therein. v

The object of the present invention has been to ensure that the oilwill be supplied in volume or pressure which will be fairly regular, and the mounting of the pump such as will entail little structural variation.

According to the invention, I secure on a fixed part of the engine adjacent the front end thereof an adjustable bracket or arm, the upper end being provided with suitable bearings for the fan shaft. In this bracket is formed a pump cylinder provided with a plunger which is adapted to be reciprocated by a cam or other suitable means operated by a pulley in contact with the fan belt.

Vvhen the engine is running and the fan belt moving, the pump is operated, circulating the required amount of oil for the engine and bearings. When the engine is speeding up or running slow, the fan belt is correspondingly moving the pump to the altered speed.

Suitable means are provided. for adjusting the bracket so as to alter the tension of a pulley on the fan belt.

But in order that my invention may be more clearly comprehended I will now refer to the accompanying drawings in which is illustrated my preferred form of-the inven tion.

Figure 1 is a part sectional elevation of the fan bracket and reciprocating pump therein, while 1923. Serial No. 653,600.

Figure 2 is a part sectional end view of Figure l.

Figure 3 is a perspective view of the fan bracket and pump, the fan, driving pulley and fan shaft being shown in dotted lines.

Figure 4 is a perspective view on a smaller scale illustrating the driving means and arrangement of pipes.

The same numerals indicate the same or corresponding parts.

8 is the fan bracket, with bosses 9 and 10, boss 9 having secured therein the fan shaft 11 whilst boss 10 is for pivotally securing the bracket to the engine casing. 12 is a pump cylinder or barrel and 13 a crank case integral with the fan bracket 8. 14 is an elongated bearing of the crankcase in which the stub shaft 15 revolves, and secured to said stub shaft is a driving pulley 16 and 0 i the eccentric disc or crank 17. 18 is a connecting rod pivoted to the disc or crank 17 at 19 and to the gudgeon pin 20 in the piston or plunger 21 in the pump cylinder or barrel 12. The upper portion of the pump barrel 12 is threaded at 22 and inserted therein is the ball or other suitable valve seating 23 with ball 24 which is retained in position by the spring 25 and the lower threaded portion of the union connection 26.

27 is the pump valve casing integral with the side of the barrel 12, the ball 28 of which is retained on its seating 29 by the spring 30, the tension of said spring being adjustable by the screw 31. The'cover 32 of the crank 5 case is maintained in place by a ring of spring wire 33 which takes in a groove or recess 34. 35 is a small boss or lug in which is provided a screw or bolt 36 which takes up against a suitable portion of the engine 0 casing to adjust the tension of the pulley 16 on the fan belt 37. The pipe 38 leads f'ron'i the oil pump, and may be led through a sight gauge on the dash board. The oil after pass ing through the pump is forced through the pipe 39 to the breather opening 40. 41 rep-, resents the fan and 42 the fan pulley, while 43 is the fan belt driving pulley on the engine shaft 44.

To operate the pump 12, the pulley 16 is adjusted by the bolt 36 taking up against a portion of the engine casing so that said pul ley contacts with the outer surface of the fan driving belt 37. Oil is drawn up from the pump through the pump valve 27 and is delivered through the delivery valve 22 and is led thence to the breather 1 opening 40.

Having thus described my invention, What I claim as new and desire to protect by Letters Patent is In circulating oil pumps for internalcombustion engines, a bracket arm having a bearing for the [EH11 shaft, :acylinder in said arm arranged to be brought into communication with an inlet and outlet in an oil circulation system, a plunger in'the cyhnder, a crank shaft to operate said plunger and provided with a pulley, said pulley being driven by:contaot With-the vfan --belt, the said bracket having a boss for securing the same to the engine casing and a lug provided with a screw to effect'adjustment of the \tension of 

